Interactive effects between nest microclimate and nest vegetation structure confirm microclimate thresholds for Lesser Prairie-Chicken nest survival
Blake A. Grisham, Alixandra J. Godar, Clint W. Boal, David A. Haukos
2016, The Condor (118) 728-746
The range of Lesser Prairie-Chickens (Tympanuchus pallidicinctus) spans 4 unique ecoregions along 2 distinct environmental gradients. The Sand Shinnery Oak Prairie ecoregion of the Southern High Plains of New Mexico and Texas is environmentally isolated, warmer, and more arid than the Short-Grass, Sand Sagebrush, and Mixed-Grass Prairie ecoregions in Colorado,...
Hampton roads regional Water-Quality Monitoring Program
Aaron J. Porter, John D. Jastram
2016, Fact Sheet 2016-3095
IntroductionHow much nitrogen, phosphorus, and suspended solids are contributed by the highly urbanized areas of the Hampton Roads region in Virginia to Chesapeake Bay? The answer to this complex question has major implications for policy decisions, resource allocations, and efforts aimed at restoring clean waters to Chesapeake Bay and its...
Hydrologic assessment of the shallow groundwater flow system beneath the Shinnecock Nation tribal lands, Suffolk County, New York
Michael L. Noll, Simonette L. Rivera, Ronald Busciolano
2016, Scientific Investigations Report 2016-5110
Defining the distribution and flow of shallow groundwater beneath the Shinnecock Nation tribal lands in Suffolk County, New York, is a crucial first step in identifying sources of potential contamination to the surficial aquifer and coastal ecosystems. The surficial or water table aquifer beneath the tribal lands is the primary...
An empirical approach for estimating stress-coupling lengths for marine-terminating glaciers
Ellyn Enderlin, Gordon S. Hamilton, Shad O’Neel, Timothy C. Bartholomaus, Mathieu Morlighem, John W. Holt
2016, Frontiers in Earth Science (4) 1-12
Variability in the dynamic behavior of marine-terminating glaciers is poorly understood, despite an increase in the abundance and resolution of observations. When paired with ice thicknesses, surface velocities can be used to quantify the dynamic redistribution of stresses in response to environmental perturbations through computation of the glacier force balance. However,...
Decadal shifts in grass and woody plant cover are driven by prolonged drying and modified by topo‐edaphic properties
Seth M. Munson, Temuulen T. Sankey, George Z. Xian, Miguel L. Villarreal, Collin G. Homer
2016, Ecological Applications (26) 2480-2494
Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at...
Mineralogy, chemistry, and fluid-aided evolution of the Pea Ridge Fe oxide-(Y + REE) deposit, southeast Missouri, USA
Daniel E. Harlov, Corey J. Meighan, Ian D. Kerr, Iain M. Samson
2016, Economic Geology (111) 1963-1984
The Kiruna-type Pea Ridge iron oxide-apatite (IOA) deposit is hosted by a sequence of 1.47 Ga rhyolite tuffs of the St. Francois Mountains, southeast Missouri, USA. It consists of a series of altered zones composed mainly of amphibole, magnetite, hematite, and quartz, together with the presence of several rare earth...
Mineral thermometry and fluid inclusion studies of the Pea Ridge iron oxide-apatite–rare earth element deposit, Mesoproterozoic St. Francois Mountains Terrane, southeast Missouri, USA
Albert H. Hofstra, Corey J. Meighan, Xinyu Song, Iain Samson, Erin E. Marsh, Heather A. Lowers, Poul Emsbo, Andrew G. Hunt
2016, Economic Geology (111) 1985-2016
Mineral thermometry and fluid inclusion studies were conducted on variably altered and mineralized samples from the Mesoproterozoic Pea Ridge iron oxide-apatite (IOA)-rare earth element (REE) deposit in order to constrain P-T conditions, fluid chemistry, and the source of salt and volatiles during early magnetite and later REE mineralization.Scanning electron microscopy...
Changes in pond water levels and surface extent due to climate variability alter solute sources to closed-basin Prairie-Pothole wetland ponds, 1979 to 2012
James W. LaBaugh, David M. Mushet, Donald O. Rosenberry, Ned H. Euliss Jr., Martin B. Goldhaber, Christopher T. Mills, Richard D. Nelson
2016, Wetlands (36) 343-355
Wetter conditions beginning in 1993 resulted in marked changes in water levels and surface extent of prairie-pothole region wetland ponds, including closed-basin wetlands in the Cottonwood Lake area of North Dakota, U.S.A. Pond water levels after 1993 were consistently 0.5 to 2 m higher than during 1979–1993 (≤ 1 m deep) in...
Bitumen prices and structural changes in North American crude oil markets
Emil D. Attanasi
2016, Natural Resources Research (25) 487-496
In an earlier report, changes in bitumen prices at Hardesty, Alberta, Canada, were modeled as the responses to changes in monthly prices of Hardesty light/medium crude oil for the period 2000–2006 with a simple error correction econometric model. This note re-examines that price relationship for the period 2009–2014. Over the...
Post-fire debris flows in southern California: Science, prediction, and implications for practitioners
Dennis M. Staley, Jason W. Kean
2016, Book chapter, Applied Geology in California
No abstract available....
Katmai National Park and Preserve and Alagnak Wild River: Geologic resources inventory report
Chad Hults, Judith E. Fierstein
2016, Natural Resource Report NPS/NRSS/GRD/NRR—2016/1314
The Geologic Resources Inventory (GRI) is one of 12 inventories funded by the National Park Service (NPS) Inventory and Monitoring Program. The Geologic Resources Division of the NPS Natural Resource Stewardship and Science Directorate administers the GRI. This GRI report was written for resource managers to support science-informed decision making....
Shifting patterns in SAV species diversity and community structure
Nancy B. Rybicki, Christopher E. Tanner, Erin C. Shields, Kenneth A. Moore, Stanley Kollar, David J. Wilcox, Katherina A. M. Engelhardt
2016, Book chapter, Chesapeake Bay submerged aquatic vegetation (SAV): A third technical synthesis
This chapter examines the shifting patterns in Chesapeake SAV community structure and the potential environmental variables that explain variation in species composition patterns at both long and short time periods. Bay-wide species occurrence data sets are summarized. These data show that twenty-seven or more species of SAV are found within...
Response of fish assemblages to decreasing acid deposition in Adirondack Mountain lakes
Barry P. Baldigo, Karen Roy, Charles T. Driscoll
2016, NYSERDA Report 17-01
The CAA and other federal regulations have clearly reduced emissions of NOx and SOx, acidic deposition, and the acidity and toxicity of waters in the ALTM lakes, but these changes have not triggered widespread recovery of brook trout populations or fish communities. The lack of detectable biological recovery appears to...
Response of fish assemblages to declining acidic deposition in Adirondack Mountain lakes, 1984–2012
Barry P. Baldigo, Karen Roy, Charles T. Driscoll
2016, Atmospheric Environment (146) 223-235
Adverse effects of acidic deposition on the chemistry and fish communities were evident in Adirondack Mountain lakes during the 1980s and 1990s. Fish assemblages and water chemistry in 43 Adirondack Long-Term Monitoring (ALTM) lakes were sampled by the Adirondack Lakes Survey Corporation and the New York State Department of Environmental...
Iron and oxygen isotope signatures of the Pea Ridge and Pilot Knob magnetite-apatite deposits, southeast Missouri, USA
Tristan Childress, Adam C. Simon, Warren C. Day, Craig C. Lundstrom, Ilya N. Bindeman
2016, Economic Geology (111) 2033-2044
New O and Fe stable isotope ratios are reported for magnetite samples from high-grade massive magnetite of the Mesoproterozoic Pea Ridge and Pilot Knob magnetite-apatite ore deposits and these results are compared with data for other iron oxide-apatite deposits to shed light on the origin of the southeast Missouri deposits....
Haemosporidian parasite infections in grouse and ptarmigan: Prevalence and genetic diversity of blood parasites in resident Alaskan birds
Matthew M. Smith, Caroline R. Van Hemert, Richard Merizon
2016, International Journal for Parasitology: Parasites and Wildlife (5) 229-239
Projections related to future climate warming indicate the potential for an increase in the distribution and prevalence of blood parasites in northern regions. However, baseline data are lacking for resident avian host species in Alaska. Grouse and ptarmigan occupy a diverse range of habitat types throughout the northern hemisphere and...
New organic reference materials for hydrogen, carbon, and nitrogen stable isotope-ratio measurements: caffeines, n-alkanes, fatty acid methyl esters, glycines, L-valines, polyethylenes, and oils
Arndt Schimmelmann, Haiping Qi, Tyler B. Coplen, Willi A. Brand, Jon Fong, Wolfram Meier-Augenstein, Helen F. Kemp, Blaza Toman, Annika Ackermann, Sergey Assonov, Anita Aerts-Bijma, Ramona Brejcha, Yoshito Chikaraishi, Tamim Darwish, Martin Elsner, Matthias Gehre, Heike Geilmann, Manfred Groning, Jean-Francois Helie, Sara Herrero-Martin, Harro A.J. Meijer, Peter E. Sauer, Alex L. Sessions, Roland A. Werner
2016, Analytical Chemistry (88) 4294-4302
An international project developed, quality-tested, and determined isotope−δ values of 19 new organic reference materials (RMs) for hydrogen, carbon, and nitrogen stable isotope-ratio measurements, in addition to analyzing pre-existing RMs NBS 22 (oil), IAEA-CH-7 (polyethylene foil), and IAEA-600 (caffeine). These new RMs enable users to normalize measurements of samples to...
Controls on the geochemical evolution of Prairie Pothole Region lakes and wetlands over decadal time scales
Martin B. Goldhaber, Christopher T. Mills, David M. Mushet, R. Blaine McCleskey, Jennifer Rover
2016, Wetlands (36) 255-272
One hundred sixty-seven Prairie Pothole lakes, ponds and wetlands (largely lakes) previously analyzed chemically during the late 1960’s and early to mid-1970’s were resampled and reanalyzed in 2011–2012. The two sampling periods differed climatically. The earlier sampling took place during normal to slightly dry conditions, whereas the latter occurred during...
Survival and habitat use of fledgling Golden-winged Warblers in the western Great Lakes region
Henry M. Streby, Sean M. Peterson, David E. Andersen
2016, Book chapter, Golden-winged Warbler ecology, conservation, and habitat management (Studies in Avian Biology, volume 49)
Postfledging habitat use and fledgling survival remain unstudied for most songbirds, but this period is critical for understanding breeding habitat associations and full-season productivity. We used radiotelemetry to study movements, cover-type selection, and survival of fledgling Golden-winged Warblers (Vermivora chrysoptera) during the dependent postfledging period in managed forest landscapes of...
Effects of stream-adjacent logging in fishless headwaters on downstream coastal cutthroat trout
Douglas S. Bateman, Matthew R. Sloat, Robert E. Gresswell, Aaron M. Berger, David Hockman-Wert, David W. Leer, Arne E. Skaugset
2016, Canadian Journal of Fisheries and Aquatic Sciences (73) 1898-1913
To investigate effects of headwater logging on downstream coastal cutthroat trout (Oncorhynchus clarkii clarkii) populations, we monitored stream habitat and biotic indicators including biomass, abundance, growth, movement, and survival over 8 years using a paired-watershed approach. Reference and logged catchments were located on private industrial forestland on ∼60-year harvest rotation....
Multi-decadal increases in dissolved organic carbon and alkalinity flux from the Mackenzie drainage basin to the Arctic Ocean
Suzanne E. Tank, Robert G. Striegl, James W. McClelland, Steven V. Kokelj
2016, Environmental Research Letters (11) 1-10
Riverine exports of organic and inorganic carbon (OC, IC) to oceans are intricately linked to processes occurring on land. Across high latitudes, thawing permafrost, alteration of hydrologic flow paths, and changes in vegetation may all affect this flux, with subsequent implications for regional and global carbon (C) budgets. Using a...
Detection of water and/or hydroxyl on asteroid (16) Psyche
Driss Takir, Vishnu Reddy, Juan A. Sanchez, Michael K. Shepard, Joshua P. Emery
2016, Astronomical Journal (153)
In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 μm spectral region using the long-wavelength cross-dispersed (LXD: 1.9–4.2 μm) mode of the SpeX spectrograph/imager at the NASA Infrared Telescope Facility. Our observations show that Psyche exhibits a 3 μm absorption feature, attributed...
Growth, food consumption, and energy status of juvenile pallid sturgeon fed natural or artificial diets
Hilary A. Meyer, Steven R. Chipps, Brian D. S. Graeb, Robert A. Klumb
2016, Journal of Fish and Wildlife Management (7) 388-396
Stocking of hatchery-raised fish is an important part of the pallid sturgeon Scaphirhynchus albus recovery program. In the wild, juvenile pallid sturgeon consume primarily aquatic insects, although little is known about specific dietary needs. In hatchery settings, pallid sturgeon are fed commercial diets that are formulated for salmonids. To compare...
Eastern Whip-poor-wills (Antrostomus vociferus) are positively associated with low elevation forest In the central Appalachians
Christina L. Slover, Todd E. Katzner
2016, Wilson Journal of Ornithology (128) 846-856
Populations of the Eastern Whip-poor-will (Antrostomus vociferus) are thought to be declining because of a range of potential factors including habitat loss, pesticide use, and predation. However, this species is nocturnal and, as a consequence, it is poorly studied, and its population status is not well assessed by traditional diurnal...
Conservation status of polar bears (Ursus maritimus) in relation to projected sea-ice declines
Eric V. Regehr, Kristin L. Laidre, H. Resit Akcakaya, Steven C. Amstrup, Todd C. Atwood, Nicholas J. Lunn, Martyn E. Obbard, Harry Stern, Gregory W. Thiemann, Øystein Wiig
2016, Biology Letters (12) 1-5
Loss of Arctic sea ice owing to climate change is the primary threat to polar bears throughout their range. We evaluated the potential response of polar bears to sea-ice declines by (i) calculating generation length (GL) for the species, which determines the timeframe for conservation assessments; (ii) developing a standardized...
